Vibrator



Se t,-2; 1330. c. a. PICKOP 1,774,612

VIBRATOR Filed Dec. 19, 1928 wkmw v W!) Patented Sept. 2, 1939 UNITED STATES PATENT QFFICE GEORGE B. PICKUP, 01" NEW HAVEN, CONNECTICUT, ASSIGNOR TO MALLEABLE IRON FITTINGS COMPANY, OF BRANFORD, CONNECTICUT VIBRATOR This invention relates to vibrators or jarring and rapping mechanisms and more particularly to vibrators of the type wherein a plunger reciprocates within a cylinder, rap- 5 pin the cylinder head at the end of the stroke. The invention is applicable to this class of vibrators regardless of the size in which they are made, but is particularly desirable in the case of the larger size, so-called flask rappers, wherein the cylinder heads are secured in place by belts or like retaining means.

Experience has shown that where the head is bolted to the cylinder or secured in place by any of the known methods, the metal of the securing means will, after a period of use, become crystallized or fatigued and will give way. It will, of course, be appreciated that the continual rapping of the piston upon the heads will in time bring about the failur of the retaining means, although the effect of each distinct stroke will not be'appreciable.

Considerable experimentation has been carried on in the manufacture of bolts hold the vibrator heads in place, and these bolts have been made from various kinds of steel, grading-from the lower and cheaper grades of this metal to those of higher quality, and as yet no material has been found which will'withs'tand the continual and oftrepeated shocks delii-ered by the piston. Bolts made of any metal now known will in time give way and the heads will become detached from the cylinders. lVhen this 0e curs, the work must be stopped until repairs can be made, and this often results in expensive an annoying delay.

one object of this inventionis to overcome the oefects above referred to and to secure a vibrator head to the cylinder or. body thereof in such amanner that the shocks due to the piston will be taken up to some extent before being transmitted to the retaining means which holds'thc head in place.

' Another object ofthe invention is the provision of a buffer between the vibrator heads and the retaining means which vholds the heads in place, whereby the blows delivered upon the vibrator heads willbe lessened be- Serial No. 327,007.

fore being transmitted to the retaining means.

More specifically, 'I contemplate by the present improvement securing a head of the vibrator to the body thereof by bolts and positioning between the vibrator head. and the re aining means on the ends of the bolts buliers of shock-deadening material, such as a thick Washer of solid rubber, for example, whereby the blows delivered upon the vibrator head by the piston will be taken up by the rubber to some extent before being transmitted to the nuts or other retaining means on the bolt. Experience has shown that this material is sui'liciently resilient and compressible to lessen the effect of the blows upon the retaining means, while, at the same time, the cliiciency of the vibrator is not appreciably lessened, and also this material is particularly serviceable in that it will stand up for an indefinite periodunder hard usage.

To these and other ends the invention consists in the novel features and combination of parts to be hereinafter described and claimed.

In the accompanying drawings, 7

Fig. 1 is a side elevational View of a vibrator embodying my improvements;

Fig. 2 is an end'view of the same; and

Fig. 3 is a sectional View on line 3--3 of Fig. 2. 7

To illustrate a preferred embodiment of my invention, 1 have shown in Fig. l a vibrator in the form of a flask rapper, comprising a cylinder or body portion 10 provided with an eye 11 by which it may be connected to a crane hook or the like for handling. lVithin the cylinder 10 is mounted a reciprccable piston 12 of any approved form.

At the ends of the cylinder are provided the heads 13 and i l, which are somewhat larger than the cylinder in order to receive the bolts by which they are secured in place, as will be more, fully described hereinafter. These heads are provided with anvil surfaces 15 and 15 which enter the cylinder to some extent and which directly receive the blows from the piston 12. The headlS in the embodiient shown is provided with an attaching hook 16, by which it may be attached to the flask or other article to be vibrated,- and is also provided with openings 17, through which are passed the bolts 18 which secure the head in place.

Upon the ends of these bolts may be mounted suitable retaining means such as the nuts 19. lVhile two of the bolts 18 are shown in the drawings, it will be understood that in the usual instance four of these bolts are employed, there being two upon each side of the vibrator.

The head H is also provided with four openings 20 to receive the bolts 18, and is provided on the outer face thereof with a hollow boss 21 which surrounds each of the bolt openings and within which is designed to be received the buffer which relieves the retaining means of the shocks incident to the operation of the device.

The bolts 18 are sufficiently long to eX- tend through the hollow bosses 21, as shown in Fig. 3, and to project to a suitable extent from these bosses. Mounted within each of the bosses 21 and surroumling the corre-,

sponding bolt 18, is a buffer 22 in the form of a thick washer or the like provided with an opening 23 to receive the bolt. These buffers are preferably made of solid rubber and may be of suliieient thickness to project slightly beyond the outer edge of the boss 21, as shown more particularly in Fig. 3 of the drawings. In diameter they will preferably be of the proper size to fit snugly within the bosses. A washer 24 is positioned upon the bolt against the outer face of the buffer, which washer will. advantageously be provided with rounded ends so that it will not cutinto the rubber buffer, and a retaining member such as the nut 25 is then placed on the end of the bolt.

The walls of the bosses 2t serve to confine the buffers and prevent lateral distortion thereof when in use.

It will be obvious that when the piston strikes against the head 14 of the vibrator, the blow will have a tendency to drive this head in a direction away from the cylinder. The force of the blow, instead of being transmitted directly to the retaining means or nut and thence to the bolt, will be taken up and appreciably lessened by the buffer so that the vibrator may be subjected to continual use without the metal of the bolts becoming fatigued or crystallized and giving way. Likewise. when the piston strikes the head 13 the force of this blow will tend to move the head to the left away from the cylinder. carrying the bolts 18 therewith. and the force of the blow will again be taken up by the buffers mounted in the head 14:.

If desired. buffers may be arranged in the heads at both ends of the vibrator body, although I have found in practice that admirable results are obtained when one only of the heads is so provided.

It will also be obvious that the invention is not limited to the use of the particular material described, nor to the particular method of mounting the buffers between the vibrator heads and the retaining means, for while I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all the details shown, but is capable of modi fica-tion and variation within the spirit of the invention and within the scope of the appended claims.

hat I claim is:

1. A vibrator comprising a body portion and a head mounted at the end thereof, bolts secured to the body portion passing through openings in the head, retaining means on the bolts to hold the head in place, compressible buffer means mounted between the head and the retaining means, and a compressing washer between the buffer means and the retaining means.

2. A vibrator comprising a body, a head mounted at the end thereof, retaining means to hold said head to the body, a buffer of resilient compressible material mounted between the head and the retaining means, and a compressing member between the retaining means and buffer.

3. A vibrator comprisin a body, a head mounted at the end thereof? retaining means to hold said head to the body, a buffer of resilient compressible material mounted between the head and the retaining means, and means surrounding the buffer member to confine it against lateral distort-ion.

4. A vibrator comprising a body, a head mounted at the end thereof, bolts secured to the body and passed through openings in said head, retaining means on the ends of the bolts to hold the head in place, and washers of solid rubber mounted between the head and said retaining means.

5. A vibrator comprising a body, a head mounted at the end thereof, bolts secured to the body and passed through openings in said head, retaining means on the ends of the bolts to hold the head in place, washers of solid rubber mounted between the head and said retaining means, and metallic bands surrounding said rubber washers to confine them against lateral. distortion.

6. A vibrator comprising a body and a head mounted at the end thereof, means to retain said head upon the body, said head being provided with a hollow boss, and a buffer of compressible material mounted in said boss and engaged by said retaining means.

7. A vibrator comprising a body and a head mounted at the end thereof, means to retain said head upon the body, said head being provided with a hollow boss, and a buffer of compressible material mounted in said boss and engaged by said retaining means, the wall of said boss confining the buffer against lateral distortion.

8. A vibrator comprising a body portion and a head mounted at the end thereof, bolts secured to the body portion and passed through openings in the head, said head being provided with hollow bosses surrounding said openings, a compressible buffer mounted in each of said bosses, and retaining means on the ends of the bolts and engaging said buffers.

9. A vibrator comprising a body, a head mounted at each end thereof, bolts spanning the body portion and having their ends passed through openings in the heads, retaining means on the ends of the bolts to hold the heads in place, and bufi'ers positioned between the retaining means and one of the heads.

10. A vibrator comprising a body, a head mounted at each end thereof, bolts spanning the body portion and having their ends passed through openings in the heads, retaining means on the ends of the bolts to hold the heads in place, and buffers positioned between the retaining means and one of the heads, said buffers comprising washers of solid rubber surrounding the bolts.

11. A vibrator comprising a body, a head mounted at each end thereof, bolts spanning the body portion and having their ends passed through openings in the heads, retaining means on the ends of the bolts to hold the heads in place, buffers positioned between the retaining means and one of the heads, said bufi'ers comprising washers of solid rubber surrounding the bolts, and means surrounding said buffers to confine them against lateral distortion.

12. A Vibrator comprising a body, a head mounted at each end thereof, bolts spanning the body portion and having their ends passed through openings in the heads, retaining means on the ends of the bolts to hold the heads in place, buffers positioned between the retaining means and one of the heads, said bufii'ers comprising Washers of solid rubber surrounding the bolts, said head being provided with hollow bosses surrounding the bolts and said bufiers being received within the bosses.

In testimony whereof, I have hereunto set my hand this 17th day of December,

GER-OGE B. PIGKOP. 

